Midway through the 8 p.m. hour of Monday’s programming at the convention,Patricia Smith, whose son was killed in the Benghazi terrorist attack, spoke emotionally about how “I blame Hillary Clinton personally for the death of my son.”

But her speech was preempted — by the candidate.

Fox News’s Bill O’Reilly, citing a “breaking-news situation,” cut off convention coverage to do a phone interview with the candidate. Trump’s “breaking news” turned out to be little more than a denunciation of Ohio Gov. John Kasich for skipping the convention. “Look, I beat him very badly” in the primaries, Trump taunted. “If I were him and gotten beaten that badly I probably wouldn’t show up either.”

Melania Trump’s speech at the GOP convention in Cleveland is drawing comparisons to Michelle Obama’s speech at the 2008 Democratic National Convention in Denver. Here’s a side-by-side look at both. (Jenny Starrs/The Washington Post)

For weeks, GOP leaders pleaded with Trump to build a professional operation, but his campaign resisted, saying he didn’t need to act like other politicians. Now we see the consequences: a convention rally of conspiracy theorists, co-hosted by Trump’s longtime political adviser; a needless floor fight over convention rules in which the hapless presiding officer, a backbench congressman, walked off the stage; and plagiarized phrases in a speech by the would-be first lady that went unvetted by Trump’s thin staff.

Trump allies variously reacted by saying there was no plagiarism, that only 7 percent of the speech was plagiarized, that the staffer responsible should be fired, and that a part of the Michelle Obama speech that Melania Trump lifted from was itself purloined from radical leftist Saul Alinsky.

Never Trump has given way to Everywhere Trump in Cleveland: A stream of interviews and tweets distracting from proceedings. Trump packed the week’s prime-time speakers list with low-wattage names unlikely to upstage him — celebrities along the lines of Scott Baio — Chachi of “Happy Days” fame, who days earlier tweeted a message labeling Hillary Clinton a vulgarity for female genitals. The top-billed speakers: Melania Trump (Monday), Tiffany and Donald Trump Jr. (Tuesday), Eric Trump (Wednesday), Ivanka Trump (Thursday) and, of course, Donald Trump (always). Also in prime time: The manager of Trump Winery (a “world-class destination,” she informed the delegates).

The shootings of police in Dallas and Baton Rouge gave Republicans an opening to try to establish themselves as the party that will keep Americans safe. Monday night’s program was, shrewdly, packed with law-enforcement and military types, numerous “victims of illegal immigrants” and former NewYork mayor Rudy Giuliani, who fired up the delegates.

But then the sound system blasted Queen’s “We Are the Champions,” and Trump made his backlit entrance. “Oh, we’re going to win, we’re going to win so big,” he said. “We’re going to win so big. . . . We’re going to win so big.”

Melania Trump made only one passing reference to the night’s theme of security. She spoke, rather, about her husband’s manifest greatness. “He will do this better than anyone else can, and it won’t even be close.”

His children picked up the magnificence Tuesday, attesting that “his desire for excellence is contagious” (Tiffany Trump) and that “we’re the only children of a billionaire as comfortable in a D10 Caterpillar as we are in our own cars” (Donald Jr.).

Trump’s personal greatness was, likewise, the theme of his Pence rollout Saturday, when he went on, mostly about himself, for 4,000 words before yielding to his vice-presidential nominee: “I’ve been a very, very, very successful businessperson. . . . I won in landslides. . . . I dominated with the evangelicals.”

The situation was much the same on “60 Minutes” on Sunday: When Lesley Stahl called him “brash,” Trump countered that he’s “religious.” How’s that? “I won the evangelicals.”

Pence tried to praise his boss: “He speaks from his heart.”

“Well, I think I speak from my heart and my brain, just so we understand,” Trump revised.

Stahl observed that “you’re not known to be a humble man.”

Volleyed Trump: “I’m much more humble than you would understand.” Seconds later, he said people tell him, “you’re going to go down in the history books.”

There are signs that delegates have misgivings about their narcissistic nominee: The convention floor is quieter than usual, the roll call lethargic, the Trump merchandise booths uncrowded.

Perhaps some of them can remember, eight years ago, when their nominee, a war hero, spoke of serving a “cause greater than self.” For Trump, this is impossible. There is no cause greater than himself.